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#4562401 - 11/02/17 07:25 PM Can I use 80w90 instead of 75w90?
Emanuel Offline


Registered: 07/01/17
Posts: 183
Loc: Venezuela, South America
I have a 01 Corolla with a 5 spd transmission and I would like to change the transmission oil, the owner´s manual calls for a 75w90 GL4 oil and I can only find a 80w90 GL4 and a 75w90 GL5, I have read that GL5 should not be used in transmissions that call for GL4 oil so my only option is 80w90.

Would it be safe to use this oil? The coldest ambient temp here is 68 °F BTW

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#4562403 - 11/02/17 07:27 PM Re: Can I use 80w90 instead of 75w90? [Re: Emanuel]
JohnnyJohnson Online   content


Registered: 10/22/09
Posts: 2740
Loc: Wet side WA
Emanuel you Toyota sure shouldn't be burning much of that 75w90 but cold starts may be for the birds.


Edited by JohnnyJohnson (11/02/17 07:27 PM)
_________________________
2004 Toyota Corolla 121682
Out: QSUD 5W-30 Purolator One 5030
In: Valvoline ML 5w-30 TG4967 117530 2-8-18
2006 Duramax 74047
Out: T6 5W-40 M1-303
In: T6 5W-40 XG9100 73752 4-22-18

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#4562415 - 11/02/17 07:40 PM Re: Can I use 80w90 instead of 75w90? [Re: JohnnyJohnson]
Emanuel Offline


Registered: 07/01/17
Posts: 183
Loc: Venezuela, South America
Originally Posted By: JohnnyJohnson
Emanuel you Toyota sure shouldn't be burning much of that 75w90 but cold starts may be for the birds.
grin

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#4562419 - 11/02/17 07:43 PM Re: Can I use 80w90 instead of 75w90? [Re: Emanuel]
bullwinkle Offline


Registered: 10/09/04
Posts: 7665
Loc: Cincinnati, OH, USA
Use the GL4-I made the mistake of putting GL5 75W90 in the xB in my sig, synchronizers wouldn't work correctly, causing bad shifting. Went back to GL4, problem disappeared.
_________________________
06 Ram 3500 CTD 4X4(FG Venturi), 93 GMC C3500 6.2, 89 F-450 7.3, 98 XJ 4.0(XG8A), 05 xB(XG3600), 15 Transit 3.7, 03 Merc Grand Marquis 4.6 2V(XG2)

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#4562447 - 11/02/17 08:12 PM Re: Can I use 80w90 instead of 75w90? [Re: JohnnyJohnson]
khittner Offline


Registered: 07/13/12
Posts: 309
Loc: Michigan
Originally Posted By: JohnnyJohnson
Emanuel you Toyota sure shouldn't be burning much of that 75w90 but cold starts may be for the birds.


From what I understand, gear oil and engine oil use different viscosity scales; an 80w gear oil is pretty close in thickness/pourability to a 30w engine oil. I wouldn't use gear oil in an engine, but its viscosity may not be a problem.

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#4562459 - 11/02/17 08:30 PM Re: Can I use 80w90 instead of 75w90? [Re: Emanuel]
Kuato Offline


Registered: 10/23/05
Posts: 7094
Loc: Colorado
Yes; in your temperature that will be a good oil.
_________________________
Thick vs Thin test: 15k / 43k miles complete

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#4562461 - 11/02/17 08:30 PM Re: Can I use 80w90 instead of 75w90? [Re: khittner]
Emanuel Offline


Registered: 07/01/17
Posts: 183
Loc: Venezuela, South America
Originally Posted By: khittner
Originally Posted By: JohnnyJohnson
Emanuel you Toyota sure shouldn't be burning much of that 75w90 but cold starts may be for the birds.


From what I understand, gear oil and engine oil use different viscosity scales; an 80w gear oil is pretty close in thickness/pourability to a 30w engine oil. I wouldn't use gear oil in an engine, but its viscosity may not be a problem.
I think he was joking

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#4562518 - 11/02/17 08:59 PM Re: Can I use 80w90 instead of 75w90? [Re: Emanuel]
LoneRanger Offline


Registered: 07/02/07
Posts: 4058
Loc: Midwest USA
80W90 GL4 should perform properly in that application.
_________________________

'09 Subaru Forester ...................(QSED DEXOS1 5W30)
'16 Moto Guzzi Stelvio 1200 .....(ENI i-Ride PG 10W60)

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#4562570 - 11/02/17 09:56 PM Re: Can I use 80w90 instead of 75w90? [Re: Emanuel]
Gebo Offline


Registered: 09/18/02
Posts: 2091
Loc: VA
Absolutely
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'98 LEX LS400 280K
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#4562571 - 11/02/17 09:56 PM Re: Can I use 80w90 instead of 75w90? [Re: Emanuel]
mattwithcats Offline


Registered: 06/13/13
Posts: 1659
Loc: Virginia
Ravenol oil guide

http://www.ravenol.de/en/oil-guide.html

RAVENOL MTF-1 SAE 75W-85
: RAVENOL TGO SAE 75W-90
: RAVENOL VSG SAE 75W-90
_________________________
2009 Smart Pure
Pennzoil Platinum Euro 0W-40, Purolator Synthetic PSL 14610, 45 mpg...
185/55R15 General HP tires, "H" speed rated, 44 psi (300 kpa)

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#4562726 - 11/03/17 06:46 AM Re: Can I use 80w90 instead of 75w90? [Re: Emanuel]
zeng Offline


Registered: 09/01/15
Posts: 2188
Loc: Malaysia
Originally Posted By: Emanuel
I have a 01 Corolla with a 5 spd transmission and I would like to change the transmission oil, the owner´s manual calls for a 75w90 GL4 oil and I can only find a 80w90 GL4 and a 75w90 GL5, I have read that GL5 should not be used in transmissions that call for GL4 oil so my only option is 80w90.

Would it be safe to use this oil? The coldest ambient temp here is 68 °F BTW


'Strange' that your 01 Toyota doesn't recommend GL5.
A 2004 does.


Anyway, go ahead with 80W90 that provides thicker MOFT for stronger components protection.
Shiftability is an 'unpredictable' animal though, never mind it's GL4.

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